1. Drug Policy Modelling Program, National Drug and Alcohol Research Centre; UNSW Sydney; Sydney Australia
2. National Drug Research Institute, Faculty of Health Sciences; Curtin University; Perth Australia
3. Behaviours and Health Risks Program, Burnet Institute; Melbourne Australia
4. Uniting Medically Supervised Injecting Centre; Sydney Australia
5. St Vincent's Hospital; Sydney Australia
6. Monash Addiction Research Centre; Melbourne Australia
7. National Drug and Alcohol Research Centre; UNSW Sydney; Sydney Australia